FiiO E07K review




  • Recommended by TR

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FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K
  • FiiO E07K


Our Score:



  • Robust, portable design
  • Pristine, powerful sound quality
  • Affordable price


  • No SPDIF input
  • Hit and miss bass/treble controls
  • Menu controls a little fiddly

Key Features

  • 96kHz/24-bit support via USB
  • 128 x 64-pixel OLED display
  • Docks on E09K desktop amp
  • Two headphone outputs
  • Bass, treble and gain settings
  • Manufacturer: FiiO
  • Review Price: £69.90


The E07K (dubbed ‘Andes’) is a portable headphone amplifier and DAC from FiiO, whose similar E17 amp earned a solid 9/10 in our review last year. It’s designed to pump top-drawer sound quality into the ears of audio enthusiasts using high-end headphones, and can be used as a high-quality sound card for a PC, or with a portable media player. It’s an upgraded version of the FiiO E7, adding a few new features that we’ll touch upon throughout the review.

Headphone amps from audiophile brands can cost a small fortune, but the remarkable thing about FiiO’s pocket amps is that they come in at under £100, which means you can get sparkling sound through your cans for less that you might think. The E07K is around £30 cheaper than the E17, potentially offering even better value than its stable mate.

FiiO E07K - Design

The E07K might only cost around £70 but FiiO hasn’t skimped on build quality. It’s a solid and robust little device, clad in brushed black aluminium on the back and edges with a large reflective panel on the front housing a 128 x 64-pixel OLED display.

FiiO E07K

At 15.2mm and 102g, it’s incredibly slim and light, allowing you to easily slip it into a pocket or bag, and with its built-in battery you get a quoted 20 hours of portable playback. In fact its dinky dimensions make it look just like a MP3 player, (which will probably be the first question you’ll be asked every time you show it to someone).

The E07K’s design differs from the E17 in that its buttons are found along the left hand edge as opposed to on the front (like the original E7). Another difference is that the E17’s front panel is brushed black aluminium, not reflective.

The E07K’s round silver buttons include volume up/down, menu and power/exit. On the opposite side is a Hold switch (not found on the E7), while on the top edge you’ll find two 3.5mm headphone jacks. On the bottom edge is a mini USB input, a 3.5mm analogue audio input for portable audio players and a slot that lets you dock it on the E09K desktop amp.

There’s no SPDIF input as found on the E17 – one of the sacrifices you make for the cheaper price tag – but on the plus side you get two headphone jacks whereas the E17 only has one.

FiiO E07K - Spec

As for the spec, it’s equipped to handle headphones with an impedance between 16 and 150Ω, and boasts a power output of 220mW at 32Ω impedance or 250mW at 16Ω impedance, the latter figure being slightly lower than the E17’s 290mW.

Its battery life is quoted at 20 hours, compared with the E17’s 15 hours, although this is likely to be a lot less in real world use.

The main upgrade from the original E7’s spec is that the E07K now supports 96kHz/24-bit signals via USB (the E7 only went up to 48kHz/16-bit). That’s terrific news if you’re a fan of high-quality lossless music formats like FLAC. The lack of SPDIF means it won’t support 192kHz/24-bit like the E17, and the quality of the signal isn’t shown on the display either.

FiiO E07K

In the box you get a USB cable, a cable with 3.5mm plugs at both ends for MP3 players, protective films for the screen, a felt carry case and even a rubber skin to protect the unit from bumps. You also get a couple of rubber bands attach it to a portable music player, which is a crude solution that makes it look like a makeshift bomb from an action movie.


January 27, 2013, 11:52 am

If you are using good quality headphones on your laptop get yourself a usb headphone amp as it will improve the sound quality no end (as long as the source files are high quality mp3 or flac etc. GIGO!)


January 28, 2013, 10:12 am

The only way you're going to get a "boost" in sound quality, as torjs99 has already said, is by using this thing as effectively an alternative sound card via USB. It can't improve upon an analogue signal it receives through that little 3.5mm jack, other than by making it louder or colouring the sound, which is of course completely subjective. Some PMPs offer fairly crappy EQs, so arguably that's one advantage a headphone amp might be able to offer, assuming it has a better one.

To be totally honest, I've always found these things a bit of a con, at least when it comes to their use with portable audio devices. The internet is awash with the usual magical audiophile claims, from people who spend more on cables than most people spend on an amplifier, but it's mostly complete tosh.

I actually made a couple of my own headphone amps a while back in penguin mint tins. Can't remember what the circuit was called but it was quite popular on the net at the time. It was good fun, and i recommend it on that basis, but not to somehow magically make your iPod sound better.

The caveat to all of that is if you're using high impedance cans with a PMP, which it just can't drive to reasonable volume levels.

EDIT: Another slight caveat is if you're taking a line-level out from the PMP and going into the headphone amp. You're by-passing the power stage of the PMP when you do that and instead using the headphone amp for your volume. The headphone amp might have better SNR or a flatter frequency response, so this might, in theory, give you a "better" overall sound. As i said above though, "better" is mostly highly subjective. A flatter frequency response sounds worse to most people, because they prefer, for example, more bass. I'd also point out that PMPs are devices engineered for playing music. They're designed to give you a good balance between quality and size (good ones are, anyway). So whether you'd be able to pick up on any slight improvements in sound quality offered by a relatively inexpensive and small headphone amp vs. the power amp in the PMP, is debatable.


January 28, 2013, 2:58 pm

Simon, the E17 has a optical in which would allow you to use its dac. I'm not sure which, if any pmp or phone have an optical out. Do the new apples have this with their new connector? My E17 is a bit underused in this respect as i use my sennheiser CX980's with my phone.


January 29, 2013, 9:41 am

Didn't the original magnetic disk based iPods have optical outs? For some reason I'm under the impression they did. I think I remember reading that the new lighting connector does have pins for a digital line-out, but don't quote me on it. Then it'd be up to whatever adapter you plug in to it whether that becomes coax/RCA or optical. I imagine coax/RCA would take less space. Not sure if any other PMPs have digital line outs either. I suspect the vast majority don't unfortunately.

Again though, it's another oft-quoted audiophile myth that the DACs in most consumer grade audio equipment are terrible and it's worth spending a small fortune on a standalone one. I wouldn't expect there to be a significant (if even audible) difference between the headphone out of a good quality PMP, and a hypothetical digital line out from the same device into a separate DAC/amp. This is especially true in the most common use-cases for PMPs, i.e. less than ideal listening environments.

In any audio set up, be it for headphone listening on the go or lounge listening at home, the place you should spend the majority of your money is on speakers/headphones. They are the component which makes the single biggest difference to sound quality. And provided you aren't using extremely cheap nasty hardware, doubling the cost of your amp, or using a standalone DAC, will make little to no audible difference.

EDIT: just to clarify, for listening at home, not "cheap and nasty" is probably £200 ish for a CD player (maybe £300 at most) and £500 - £1000 for an amp depending on power requirements. Anything more than that the law of diminishing returns applies. Then, if i had the cash, I'd spend another £1000 on speakers :D


January 29, 2013, 1:56 pm

If money's no object then we'd be better off buying something like the 'Astell and Kern AK100' (Can we have a review please?)


January 29, 2013, 2:33 pm

Yeah that'd be interesting. I've read mixed reviews. Audio quality is supposed to be great, but the device is said to be hobbled by impractical design decisions. I'd also be interested in ABX volume matched tests with something like the AK100 vs a "normal" high-end consumer PMP, just to evaluate whether the difference was really worth paying so much extra for.


January 29, 2013, 4:28 pm

yeah two seconds buffering between songs would be a major pain. Something that they could fix in the firmware though.


January 30, 2013, 8:54 am

Yeah I listen to a reasonable amount of dance music and it completely ruins mixes, especially more complex ones with a lot of cuts. What I'd really like is a PMP which is hifi grade with either wifi or 3G which has a spotify client. A bit like a portable Sonos I guess. Hopefully spotify will one day have a lossless service too, which would go nicely with hardware like that. At the moment, i just stream the "extreme" quality (which im lead to believe is 320kbps) through my nexus 7. I actually find the sound quality pretty good via some Audio Technica ES7s.


February 7, 2013, 9:56 pm

Galaxy S3 has USB host capability which will work with the DAC so there should be no inferior 3.5mm sound


February 17, 2013, 1:55 pm

Just as a little titbit: I bought an ODAC+O2 combo, intended to deliver pitch-perfect, neutral sound quality for a (relatively!) affordable price (more than twice as this), because I wasn't satisfied with Fiio products and got sound-greedy... Guess what, I can't hear a difference (that matters or convinces). Of course now I regret paying so much, because I first bought Fiio products (also tried Creative - not bad either) precisely because I never intended to go so high and thought they were more than good enough. And yes, they were. I even dreamed of this scenario shortly before getting it after a long wait... It even sounds kind of dull, maybe more in the background than some others - I can imagine someone thinking they would need to buy something "proper" after hearing this.
So there, have fun and rest assured that most of it is probably just in your head or doesn't matter anyway or is rather due to your headphone (Sennheiser HD 595)....


March 26, 2013, 12:50 pm

"Again though, it's another oft-quoted audiophile myth that the DACs in
most consumer grade audio equipment are terrible and it's worth spending
a small fortune on a standalone one." Without commenting on that, in my experience most cheap consumer laptops, many desktops and not to mention tablets have terrible sounding 3,5mm outputs - bad sound and often HORRIBLE noise levels if using IEMS or just normally sensitive cans. My last laptop was not possible to use for music listening without getting annoyed by the noise and sound quality. But I believe they're more about solving problems you have with your audio source than making a decent one better.


December 28, 2013, 3:15 pm

Monster Inspiration with Fiio e07K. I received this Fiio as a Christmas gift and boy does it make a big difference with my Inspirations (active) headphones. I usually run my music through my Note 2 and found that the volume was just not loud enough. After adding on the Fiio, it made a huge difference. Not only by just the volume but the clarity as well. I could hear each note a lot clearer than I did before. I have always been into music and though that this device would not make that much of a difference but it does. I would recommend this to anyone who wants to get better sound. period. The size of the device is a little awkward but you can get use to it. The battery life I cannot comment on as it has not gone through a complete cycle yet. I do a lot of traveling and I am excited to see how these will work on the plane etc. this device is cheap, works great, and best of all... it has taken my audio world to new heights. (download flac!)


February 22, 2014, 10:14 pm

Good to get real feedback instead of the usual placebo filled crap we get from "audiophiles" which is another name for a music lover that got delusional with gear lol


June 30, 2014, 8:40 pm

Hello, This request is a bit out of order but I didn't know who to turn too. I am severly hearing handicapped. I need a portable amp for my cell phone. All the hard of hearing sites don't cover the problem. Will this amp work for me or is there an amp that is made specifically for the hard of hearing. I need to be able to adjust my base and treble and adjust my balance since my hearing loss is different in each ear Thanks Andre


July 21, 2014, 6:35 am

samsung phones come with a widget called "adapt sound" its a hearing test, different ears/frequencies, adjusts your output accordingly. something like that added a regular amp might help.

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